#' wagepan_mgt
#'
#' A subset of data from Vella and Verbeek (1998).
#'
#' @format ## `wagepan_mgt`
#' A data frame with 4,360 rows and 5 columns:
#' \describe{
#'   \item{lwage}{Log wage.}
#'   \item{nr}{Worker ID.}
#'   \item{year}{Year}
#'   \item{union}{Union status.}
#'   \item{hours}{Annual Hours worked.}
#' }
#' @source <http://fmwww.bc.edu/ec-p/data/wooldridge/wagepan.des>
"wagepan_mgt"